Forget it. Nothing will remove the lead from your soldered joints.I'm curious, Who told you about the "junk"?The "junk" on the outside of your fittings doesn't mean thereiscontamination on the inside!Relax, a billion people around the world use soldered copper pipesjust like the Romans did 2000 years ago.If your really concerned about drinking water,get a Brita filter! (or similar)--Peter